New app: Stately

• The app complies with the inclusion criteria
• The original app author has been notified (and supports the inclusion)
• All related fdroiddata and RFP issues have been referenced in this merge request [all zero of them were referenced]
• The upstream app source code repo contains the app metadata (summary/description/images/changelog/etc) in a Fastlane folder structure
• Builds with fdroid build
• Releases are tagged

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closes rfp#1567 (closed)